GMC 1996 Sierra Owner's Manual page 201

NOTICE:
Pulling a trailer improperly can damage your
vehicle and result in costly repairs not covered by
your warranty. To pull a trailer correctly, follow
the advice in this part, and see your GM dealer
for-important information about towing a trailer
with your vehicle.
Every vehicle is ready for some trailer towing. If yours
was built with trailering options, as many are, it's ready
for heavier trailers. But trailering is different than just
driving your vehicle by itself. Trailering means changes
in handling, durability and fuel economy. Successful,
safe trailering takes correct equipment, and it has to be
used properly.
That's the reason for this part. In it are many
time-tested, important trailering tips and safety rules.
Many of these are important for your safety and that of
your passengers.
So
please read this section carefully
before you pull a trailer.
If You Do Decide To Pull A Trailer
If you do, here are some important points:
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There are many different laws, including speed limit
restrictions, having to do with trailering. Make sure-
your rig will be lega1,not only where you live but
also where you'll be driving. A good source for this
information can be state or provincial police.
Consider using a sway control if your trailer will
weigh 4,000 lbs. (1 800 kg) or less. You should
always use a sway control if your trailer will weigh
more than 4,000 lbs. (1 800 kg). You can ask a hitch
dealer about sway controls.
Don't tow a trailer at all'during the first 500 miles
(800 k m ) your new vehicle is driven. Your engine,
axle or other parts could be damaged.
Then; during the first 500 miles (800
km)
that you
tow a trailer, don't drive over 50 mph (80
ktn/h)
and
don't make starts at full throttle. This helps your
engine and other parts of your vehicle wear in at the
heavier loads.
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